Lauryl benzene sulfonic acid sodium-carbon nanotube-modified PbO2 electrode for the degradation of 4-chlorophenol

被引:60
作者
Duan, Xiaoyue [1 ,2 ]
Ma, Fang [1 ]
Yuan, Zhongxin [1 ]
Chang, Limin [3 ]
Jin, Xintong [3 ]
机构
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
[2] Jilin Normal Univ, Sch Environm Engn, Siping 136000, Peoples R China
[3] Jilin Normal Univ, Sch Chem, Siping 136000, Peoples R China
基金
中国国家自然科学基金;
关键词
Electro-catalytic oxidation; PbO2; Carbon nanotube; Lauryl benzene sulfonic acid sodium; 4-Chlorophenol; ELECTROCHEMICAL OXIDATION; ELECTROCATALYTIC OXIDATION; ANODIC-OXIDATION; AQUEOUS-SOLUTION; BY-PRODUCTS; WATER; ELECTROOXIDATION; CHLOROPHENOLS; CODEPOSITION; DESTRUCTION;
D O I
10.1016/j.electacta.2012.05.036
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The lauryl benzene sulfonic acid sodium (LAS)-carbon nanotube (CNT)-modified PbO2 electrode was fabricated by thermal deposition and electrodeposition methods. Its morphology and composition were compared with those of PbO2. CNT-PbO2, and LAS-PbO2 electrodes. It was found that CNT could be doped into the PbO2 film in the presence of LAS. The [Fe(CN)(6)](4-/3-) redox couple in 0.1 M KCl was used for initial evaluation of the electro-catalytic activity of prepared electrodes. The results showed that LAS-CNT-PbO2 electrode exhibited the largest peak current and the smallest Delta E-p in [Fe(CN)(6)](4-/3-) redox process. The stability tests showed that the service life of LAS-CNT-PbO2 electrode was 1.8 times longer than that of PbO2 electrode. The electro-catalytic activity of the prepared electrodes was also examined for the electrochemical oxidation of 4-chlorophenol (4-CP) and the LAS-CNT-PbO2 electrode exhibited the highest activity for 4-CP degradation among the four PbO2-based electrodes. Besides, HPLC was employed to identify the products resulting from the electrochemical oxidation of 4-CP and the degradation mechanism of 4-CP was also discussed. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:333 / 343
页数:11
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